import numpy as np
arrl2d = np.array([
                   [1,2,3],
                   [4,5,6],
                   [7,8,9],
                   [2,3,6]    ])
print(arrl2d[2,1])
print(arrl2d[1])
print(arrl2d[:2])
print(arrl2d[:2,:1])
print(arrl2d[1:3,1:2])

student_score =np.array([49,98,88,65,78,89,53])
print(student_score[student_score>80])
A=np.array([1,2,3])
B=np.array([2,5,2])
print(A+B)
print(A-B)
print(A*B)
print(A/B)

arr_one = np.array([[1],[2],[3]])
arr_two = np.array([1,2,3])
arr_res = arr_one+arr_two
print(arr_res)

